.content {
    width: 100vw;
    height: 100vh;
}
body::-webkit-scrollbar {
    display: none;
}
.center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    z-index: 100;
    width: 100%;
    max-width: 500px;
    height: 30vh;
    padding: 2em;
    color: #fff;
    background: rgba(0, 0, 0, .4);
    border-radius: 8px;
}
.center h1 {
    margin: 5% 0;
    font-size: 36px;
    text-align: center;
}
.center a {
    display: inline-block;
    width: 40%;
    height: 2em;
    margin: 0 4.5%;
    font-size: 18px;
    color: #fff;
    text-align: center;
    line-height: 2em;
    background: rgba(0, 0, 0, .8);
    border: 1px solid #fff;
    border-radius: 5px;
}
.center a:hover {
    background: rgba(250, 250, 250, .4)
}